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Vertical Vent Termination
Intake Air
Elbow
**1' Min. - 3' Max.
When the intake/exhaust pipes pass through an enclosed space:
Intake pipe
12
6'
Exhaust
1-2'
RainCap
2'
Min.
Storm
Collar
Roof
Flashing
Roof
Jack
Firestop/
Support
Firestop
Hanger
Strap
Condensation
Drain (Install
According to
Local Codes)
Appliance
Adapter*
* Adapter not required when
using Noritz N-Vent.
**1' minimum recommended,
but not required. Avoid installing
elbow directly on flue.
Exhaust pipe
(Combustible material)
Ceiling
Suggested inspection openings (18" x 18")
• Inspection openings are suggested for the vent intake and exhaust
pipes if they are installed in an enclosure. These openings should
be near the entrance and exit of the vent into the enclosure.
• These openings should be 18" x 18".
• Terminate at least 6' from the combustion air
intake of any appliance, and 3' from any
other building opening, gas utility meter, service
regulator etc.
• Enclose exterior vent systems below the roof
line to limit condensation and protect against
mechanical failure.
• When the vent penetrates a floor or ceiling and
is not running in a fire rated shaft, a firestop and
support is required.
• When the vent termination is located not less
than 8' from a vertical wall or similar obstruction,
terminate above the roof at least 2', but not
more than 6', in accordance with the National
Fuel Gas Code ANSI Z223.1/NFPA 54.
• Provide vertical support every 12' or as required
by the vent pipe manufacturer's instructions.
• A short horizontal section is recommended to
prevent debris from falling into the water heater.
• Install a condensation drain in the horizontal
section of the venting.
• Slope the horizontal section 1/4" for every 12"
toward the drain tee.
Sloping down toward vent terminal
External wall,
combustible material
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